To me, “endgame” is defined by the room, not the system. But if your living situation is still fluid, such as you live in an apartment but are ambitious of having more space one day, you probably haven’t hit it yet.
My house is only so big. I’d love to have a pair of Stella Utopia Evos in it, but they would take over the room. Once you have speakers sized for your musical tastes that work in the room you have, you have an endpoint. Your components will follow. You can refine things from there, but you will hit diminishing returns quickly. Changes in technology will require some additional tweaking. Who knew we were going to stream so much 20 years ago?
My biggest change has been to my vinyl front end and that has been very satisfying. I anticipate changes to my digital front end as well as my amplification. Then I will probably do one more major speaker upgrade. I will probably be done at that point.
So did you come here just to troll everyone?